rs72549310

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000110.4(DPYD):c.61C>T(p.Arg21*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000931 in 1,611,414 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

DPYD
NM_000110.4 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 3.59

Variant links:

Genes affected

DPYD (HGNC:3012): (dihydropyrimidine dehydrogenase) The protein encoded by this gene is a pyrimidine catabolic enzyme and the initial and rate-limiting factor in the pathway of uracil and thymidine catabolism. Mutations in this gene result in dihydropyrimidine dehydrogenase deficiency, an error in pyrimidine metabolism associated with thymine-uraciluria and an increased risk of toxicity in cancer patients receiving 5-fluorouracil chemotherapy. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2009]

DPYD links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 18 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 78 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-97883353-G-A is Pathogenic according to our data. Variant chr1-97883353-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188848.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DPYD	NM_000110.4 link	c.61C>T	p.Arg21*	stop_gained	Exon 2 of 23	ENST00000370192.8	NP_000101.2	Q12882-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DPYD	ENST00000370192.8 link	c.61C>T	p.Arg21*	stop_gained	Exon 2 of 23	1	NM_000110.4	ENSP00000359211.3	Q12882-1
DPYD	ENST00000306031.5 link	c.61C>T	p.Arg21*	stop_gained	Exon 2 of 6	1		ENSP00000307107.5	Q12882-2
DPYD	ENST00000460019.1 link	n.136C>T		non_coding_transcript_exon_variant	Exon 2 of 3	2
DPYD	ENST00000646851.1 link	n.710C>T		non_coding_transcript_exon_variant	Exon 6 of 6

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152004

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000120

AC:

AN:

250890

AF XY:

0.0000147

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000463

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000959

AC:

AN:

1459292

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

726088

show subpopulations

Gnomad4 AFR exome

AF:

0.00

AC:

AN:

33390

Gnomad4 AMR exome

AF:

0.00

AC:

AN:

44674

Gnomad4 ASJ exome

AF:

0.00

AC:

AN:

26086

Gnomad4 EAS exome

AF:

0.00

AC:

AN:

39594

Gnomad4 SAS exome

AF:

0.00

AC:

AN:

86182

Gnomad4 FIN exome

AF:

0.0000187

AC:

AN:

53376

Gnomad4 NFE exome

AF:

0.00000991

AC:

AN:

1109954

Gnomad4 Remaining exome

AF:

0.0000332

AC:

AN:

60276

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.0000241

AC:

0.0000240778

AN:

0.0000240778

Gnomad4 AMR

AF:

0.00

AC:

AN:

Gnomad4 ASJ

AF:

0.00

AC:

AN:

Gnomad4 EAS

AF:

0.00

AC:

AN:

Gnomad4 SAS

AF:

0.00

AC:

AN:

Gnomad4 FIN

AF:

0.00

AC:

AN:

Gnomad4 NFE

AF:

0.00

AC:

AN:

Gnomad4 OTH

AF:

0.00

AC:

AN:

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000205

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000547

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Dihydropyrimidine dehydrogenase deficiency

Pathogenic:5

Jun 23, 2014

Counsyl

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:literature only

- -

Mar 11, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 16, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 11, 2023

Genome-Nilou Lab

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 02, 2022

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as a Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with dihydropyrimidine dehydrogenase deficiency and 5-fluorouracil toxicity (MIM#274270). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0115 - Variants in this gene are known to have variable expressivity (PMID: 11783493). (I) 0201 - Variant is predicted to cause nonsense-mediated decay (NMD) and loss of protein (premature termination codon is located at least 54 nucleotides upstream of the final exon-exon junction). (SP) 0252 - This variant is homozygous. (I) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (3 heterozygotes, 0 homozygotes). (SP) 0701 - Other NMD-predicted variants comparable to the one identified in this case have very strong previous evidence for pathogenicity (ClinVar). (SP) 0803 - This variant has limited previous evidence of pathogenicity in unrelated individuals. It has been previously reported in patients with dihydropyrimidine dehydrogenase deficiency and 5-fluorouracil toxicity (ClinVar, PMID: 12562666). (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1002 - This variant has moderate functional evidence supporting abnormal protein function. Functional analysis shows that this variant resulted in an absence of detectable dihydropyrimidine dehydrogenase activity (PMID: 24648345). (SP) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

not provided

Pathogenic:1

Sep 15, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Reported with a second DPYD variant in a patient with severe 5-fluorouracil toxicity (van Kuilenburg et al., 2003); Published functional studies demonstrate a damaging effect on DPD enzyme activity, reducing it to less than 12.5% activity relative to wild type DPD (Offer et al., 2014); Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 25525159, 25381393, 25502898, 24648345, 17121937, 33305610, 26621101, 21833589, 32707991, 34621706, 19287123, 23199091, 35314707, 12562666) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.50

BayesDel_noAF

Pathogenic

0.63

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Uncertain

0.91

Vest4

0.92

GERP RS

5.8

Mutation Taster

=1/199

disease causing (ClinVar)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over